diff --git a/src/libprs500/libunzip.py b/src/libprs500/libunzip.py
index bf53ca3f5c..b26858c921 100644
--- a/src/libprs500/libunzip.py
+++ b/src/libprs500/libunzip.py
@@ -41,7 +41,7 @@ def extract(filename, dir):
             prefix = dirname
     # extract files
     for fn in filelist:
-        if not os.path.exists(os.path.dirname(fn)):
+        if os.path.dirname(fn) and not os.path.exists(os.path.dirname(fn)):
             os.makedirs(os.path.dirname(fn))
         out = open( fn, 'wb' )
         buffer = StringIO( zf.read( fn ))